SAGE channel parameter estimation method based on ARIMA filter

A channel parameter and filter technology, used in wireless communication, transmission monitoring, electrical components, etc., can solve the problems of inaccurate visual distance components, strong reflection components and diffuse scattering components, and achieve the effect of accurate estimation

Active Publication Date: 2020-08-28
CHANGAN UNIV
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  • Application Information

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Problems solved by technology

This literature uses the AR model directly to establish the model of the diffuse scattering component, but the estimated line-of-sight component, strong reflection component and diffuse scattering component are not accurate enough

Method used

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  • SAGE channel parameter estimation method based on ARIMA filter
  • SAGE channel parameter estimation method based on ARIMA filter
  • SAGE channel parameter estimation method based on ARIMA filter

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Embodiment

[0056] figure 2 It is a flow chart of an ARIMA filter-based SAGE channel parameter estimation and filtering method according to an embodiment of the present invention. refer to figure 1 and 2 , including the following steps:

[0057] 1. Set the measurement sequence number z, and obtain the channel impulse response of the zth measurement snapshot; the channel impulse response here is obtained through actual measurement.

[0058] 2. Initialize the channel parameters of all paths based on the serial interference cancellation method, such as time delay and complex amplitude;

[0059] 3. Calculate the initial diffuse scattering component based on the initial value of the path parameter obtained in the previous step, and design the ARIMA filter of the initial diffuse scattering component;

[0060] The contribution of the estimated path is subtracted from the measurement signal, and the obtained residual is defined as the diffuse scattering component. The ARIMA parameters are ca...

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Abstract

The invention discloses an SAGE channel parameter estimation method based on an ARIMA filter. The method comprises the following steps: initializing channel parameters; initializing an ARIMA filter ofthe diffuse scattering component, and subtracting the visibility range component and the strong reflection / scattering component estimated during initialization from the measurement data so as to initialize the diffuse scattering component; establishing an ARIMA model of the diffuse scattering component; designing an ARIMA filter based on the ARIMA model of the diffuse scattering component; sequentially calculating parameters of each path by adopting an SAGE channel estimation method based on an ARIMA filter; filtering the measurement signal by using the ARIMA filter; carrying out the iterative optimization based on the filtered signal by using an SAGE algorithm; estimating the channel parameters of each path, the parameters of the ARIMA filter are also updated, the diffuse scattering component is estimated, and the simulation result shows that compared with the traditional SAGE algorithm, the method provided by the invention can more accurately estimate the channel parameters of the visibility range component, the strong reflection component and the diffuse scattering component in the real radio wave propagation environment.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a SAGE channel parameter estimation method based on an ARIMA filter. Background technique [0002] Due to the dynamic nature of the wireless channel, the channel parameters in the wireless transmission environment change all the time. With the development of wireless communication technology, people have higher and higher requirements on the quality of wireless communication. In order to improve the communication quality of the wireless channel and ensure the effective transmission of signals, we need to estimate the channel parameters quickly and accurately, so it is of great significance to study efficient and accurate channel parameter estimation methods. [0003] In recent years, in order to estimate the channel parameters of the incident plane wave, such as: complex amplitude, delay, angle of incidence, angle of departure, Doppler frequency, etc.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/309H04B17/364H04B17/391H04W24/08
CPCH04B17/309H04B17/364H04B17/391H04W24/08
Inventor 王威姜苏英侯俊刘鑫一张旭贾爱琳畅田田
Owner CHANGAN UNIV
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